Complete guide to Thai Estate Tax and Gift Tax: descendants/ascendants 5% above 100M per recipient · other heirs 10% · registered spouses 100% exempt · Lifetime Gifts direct line 20M/year · others under moral obligation 10M/year Final 5% · Cross-Border Estate for US/UK/JP/AU heirs with DTA credit across 61 countries. Includes per-recipient threshold planning, multi-year gift plans, foreign wills/probate, foreign spouse recognition, foundation/trust structures, and the impact of Apostille (14 Feb 2026) on foreign wills, death certs and estate tax certificates. Based on NYC Legal casework: 187 estates + 96 lifetime-gift structurings + 42 cross-border probate — 96% success rate (2022-2025).
6 Core Scenarios
👨👦 Descendant 5% · 👥 Other 10% · 💑 Spouse 0% · 🎁 Gift direct 20M/yr · 🤝 Gift others 10M/yr · 🌏 Cross-Border 5-10% + DTA Credit
Deadlines & Penalties
Por.Mor.60 within 150 days from receipt · 5-year installment @6%/yr · penalty 1× tax + 1.5%/month · non-filing executor: 1-year imprisonment · sham: 3-7 years
Legal Basis
Inheritance Tax Act B.E.2558 (1 Feb 2016) · Revenue Code Amendment 40/2558 · Gift Tax Royal Decree 601/2559 · Sec.14 Anti-Avoidance · 61 DTAs · OECD CRS/CARF · Apostille 14 Feb 2026
👨👦 Estate to Descendant / Ascendant
IHT-DA (Estate · Direct Line)
Rate:🎯 Low rate 5% (only on portion above THB 100M per recipient)
Threshold/Exempt:Exempt first THB 100M per recipient (Per-Recipient Threshold, NOT Per-Estate)
Tax Base: Net Estate Value = the 5 taxable asset classes (real estate · registered securities · deposits · registered vehicles · other financial assets) – liabilities – estate administration costs
Taxpayer: Each heir personally · Executor withholds at source · Foreign heir taxed only on Thai-situs assets
Deadline: 🕐 File Por.Mor.60 within 150 days of the 'date inheritance is received' (title transfer completed) · installments up to 5 years (interest 6%/yr) · penalty 1× tax · surcharge 1.5%/month
✨ Tax Optimization: 🎯 (1) Split among MULTIPLE RECIPIENTS — 100M threshold applies per person · Example: 500M estate split among 5 = 5 × 100M fully exempt (vs one person: 5% × 400M = 20M tax) · (2) Lifetime Gift phased before death using 20M/yr Gift Tax threshold · (3) Establish Trust / Holdco to hold assets before death — Holdco shares are not one of the 5 taxable classes (beware Sec.14 Anti-Avoidance) · (4) Unregistered assets (gold bullion, cash, art, off-exchange crypto) sit 'outside the base'
Pitfalls: 🚨 (1) Executor who fails to file Por.Mor.60 = fine + up to 1 yr imprisonment · (2) Land Office transfers are cross-checked by Revenue via API in real time · (3) 'One recipient' aggregates ALL assets from the same decedent — grandchild getting 80M home + 60M shares = 140M, so 40M × 5% = 2M · (4) Nominee arrangements before death may be re-characterised as Sham
✓ NYC Legal Case: Family Case · decedent's total estate THB 680M (3 condos 240M + SET shares 180M + deposits 90M + land bank 170M) · split among 3 children ~227M each · Taxable per child 127M × 5% = 6.35M · total tax 19.05M · NYC Legal advance estate planning (5-yr Lifetime Gift × 20M/yr) cut it to 8.2M · Saving 10.85M · Package THB 285,000
👥 Estate to Other Heir (Non-Direct Line)
IHT-O (Estate · Other Heir)
Rate:🚨 Rate 10% (only on portion above THB 100M per recipient) — double the direct-line rate
Threshold/Exempt:Exempt first THB 100M per recipient · excess taxed at 10% (siblings, nephews/nieces, uncles/aunts, friends, non-public-benefit foundations)
Tax Base: Same 5 asset classes · Fair Market Value at date of receipt
Taxpayer: Recipients who are not ascendants/descendants/spouse · Foreign heir taxed only on Thai-situs assets · Non-public-benefit foundations also pay 10%
Deadline: Por.Mor.60 within 150 days · 5-yr installment @6% · penalty 1× · surcharge 1.5%/month
✨ Tax Optimization: 🎯 (1) Legal adoption before death — reclassifies 'Other Heir' 10% into 'Descendant' 5% · requires adoption registration + court process > 6 months · (2) Transfer to registered public-benefit foundation (Sec.12(3)) — full exemption · (3) Bequest to Buddhist temple / religion — 100% exempt · (4) Split among multiple recipients (100M each) · (5) Pre-death Lifetime Gift (10M/yr for 'others under moral obligation')
Pitfalls: 🚨 (1) Adoption within 6 months of death typically re-characterised as Sham + 10% reinstated · (2) Foundations that are not on the Ministry of Finance public-benefit list = no exemption · (3) Full siblings are NOT 'descendants' — 10% · (4) De facto spouse pays 10%, not 0%
✓ NYC Legal Case: Sibling Case · elder brother dies leaving THB 380M to a single sister (Non-Direct) · Taxable 280M × 10% = 28M · NYC Legal restructuring — 180M to public-benefit foundation (exempt) + 60M by will to temple (exempt) + sister receives 140M (Taxable 40M × 10% = 4M) · Saving THB 24M · Package THB 320,000
💑 Estate to Legally-Registered Spouse
IHT-S (Estate · Spouse)
Rate:🎯 100% exempt, no cap (Sec.3(2) Inheritance Tax Act)
Threshold/Exempt:No ceiling · every amount 100% exempt
Tax Base: Community property (sin somros) split in half first · deceased's personal property passes per will · Foreign spouse (properly registered) enjoys equal rights
Taxpayer: Legally-registered spouse ONLY · De facto (cohabiting, unregistered) does not qualify · Foreign marriage requires Apostilled marriage cert + translation + registration at Thai amphur
Deadline: Although 100% exempt, Por.Mor.60 must still be FILED FOR REPORTING when estate exceeds 100M — to prevent later disputes with Revenue
✨ Tax Optimization: 🎯 (1) Register the marriage formally (even after long cohabitation) — converts De Facto 10% to Spouse 0% · (2) Move assets into Community Property and split before death — spouse takes 50% tax-free + remaining 50% distributed to children (each using 100M threshold) · (3) Foreign spouse married abroad must Apostille + register at Thai amphur during lifetime to confirm status
Pitfalls: 🚨 (1) Marriage registration within 6 months of death may trigger special scrutiny (but cannot be re-characterised as Sham since marriage is a status) · (2) Bigamy voids the second wife's status · (3) Foreign marriage in US/UK/AU must also be Apostilled + registered in Thailand · (4) Divorced but still cohabiting = De Facto 10%
✓ NYC Legal Case: Cross-Border Spouse · Thai decedent, Australian wife, registered in Sydney 2012 · never registered in Thailand · Thai-situs assets THB 420M · Revenue argued 'not a legal spouse under Thai law' — assessed 32M · NYC Legal filed Apostilled marriage cert + Judicial Recognition Order + Foreign Judgment Recognition → Thai court affirmed spouse status · Refund 32M · Package + Litigation THB 480,000
🎁 Lifetime Gift — Descendant / Ascendant / Spouse
GIFT-DA (Gift · Direct Line)
Rate:🎯 Low rate 5% (only on portion above THB 20M per recipient per tax year)
Threshold/Exempt:Exempt THB 20M/yr per recipient (not per donor) · Per-Recipient · Per-Year · resets every 1 Jan
Tax Base: Fair Market Value of the gifted asset · cash, real estate, shares, vehicles · only on portion above 20M/yr
Taxpayer: Recipient (Donee) pays · 2 elections: (a) aggregate with income on PND.90 (PIT 5-35%) or (b) separate Final Tax 5% on PND.90/91
Deadline: File by 31 March of the following year (with PND) · Final 5% usually cheaper than aggregate PIT (which often lands in the 35% bracket)
✨ Tax Optimization: 🎯 (1) 'Phase in' 20M/yr per recipient — 10 years = 200M fully exempt (vs one-off inheritance 200M with 5% × 100M = 5M tax) · (2) Split recipients — father + mother + 3 children + spouses = 6 people × 20M = 120M/yr exempt · (3) Elect Final 5% over PIT · (4) Gift high-growth assets — post-transfer appreciation not taxed again · (5) Use Family Company Structure — transfer growing-business shares before value peaks
Pitfalls: 🚨 (1) Excess over 20M/yr unreported = penalty 1-2× + surcharge 1.5%/month · (2) Rent-free 'lending' or below-market sale can be re-characterised as Gift · (3) Family Business share transfers require FMV by IA (Independent Appraiser) · (4) Foreign donee needs TIN + Thai filing · (5) Sham 'interest-free loan agreements' without genuine intent + repayment evidence are void
✓ NYC Legal Case: Wealth Transfer Case · father with THB 300M wishes to transfer to 3 children · 5-year Estate Plan: 60M/yr (20M × 3) × 5 yrs = 300M fully exempt · Compare one-off inheritance: 300M split 3 = 100M each exempt = zero (but 300M to 1 child = 5% × 200M = 10M tax). NYC Legal Multi-Year Plan + Trust Structure THB 195,000
🤝 Lifetime Gift — Others under Moral Obligation
GIFT-M (Gift · Others under Moral Obligation)
Rate:🎯 Low rate 5% (only on portion above THB 10M per recipient per tax year) — half of the direct-line threshold
Threshold/Exempt:Exempt THB 10M/yr per recipient — for 'gifts made by affection on an occasion of moral duty or custom' (siblings, nephews/nieces, teachers, employees, supporters, weddings, ordinations)
Tax Base: Fair Market Value · cash · property · vehicle · securities · only above 10M/yr per recipient
Taxpayer: Recipient pays · Final Tax 5% or aggregated with PIT · Foreign donee needs TIN + Thai filing
Deadline: File PND.90/91 by 31 March following year · Late = 1-2× penalty + 1.5%/month
✨ Tax Optimization: 🎯 (1) Split recipients — siblings + nephews + teacher = 5 people × 10M = 50M/yr exempt · (2) Give on 'wedding / ordination / New Year / Chinese New Year' occasions clearly documented in a Gift Letter · (3) Elect Final 5% over PIT · (4) Gold / diamond / art / off-exchange crypto may sit 'outside the base' (Grey Area — case by case) · (5) Give as an 'interest-free loan' with proper contract — not a Gift but has Deemed Interest
Pitfalls: 🚨 (1) Gifts 'without customary occasion' (e.g. to unregistered partner) may be re-characterised as Gift 10% or Business Income · (2) Gifts to 'employees' may be treated as salary + PIT + WHT · (3) Gifts to non-public-benefit foundations = 10% · (4) Repeated large Sugar-Daddy transfers may be re-characterised as sex-work business income · (5) Post-divorce alimony is not a Gift — falls under Sec.42(28) exemption
✓ NYC Legal Case: Wedding Gift Case · bride & groom receive total THB 18M in wedding envelopes · split across 12 donors averaging 1.5M — below 10M/donor threshold, exempt · but one uncle gave 12M — Taxable 2M × 5% = THB 100,000 · NYC Legal Gift Letter Package + Structured Distribution (splitting the uncle's gift across 2 people via time-differentiated deeds) saved THB 100,000 · Package THB 45,000
🌏 Cross-Border Estate / Foreign-Situs Assets
IHT-X (Cross-Border / Foreign Estate)
Rate:🎯 5-10% by relationship + DTA Credit up to 100% of foreign tax paid
Threshold/Exempt:🇹🇭 Thai-Resident Heir: taxed on WORLDWIDE assets · 🌏 Non-Resident Heir: only on Thai-situs · 100M/20M/10M thresholds still apply
Tax Base: Foreign assets valued in THB at BOT middle rate on date of receipt · foreign estate / inheritance tax already paid is creditable per DTA (61 countries)
Taxpayer: 🇹🇭 Thai heir (wherever residing) taxed on worldwide estate · 🌏 Non-resident heir only on Thai-situs · Executor in Thailand must withhold and file before transfer
Deadline: Por.Mor.60 within 150 days · Foreign Estate Tax Cert must be Apostilled + certified translation · 5-yr installment @6%
✨ Tax Optimization: 🎯 (1) Use DTA Credit — foreign estate tax already paid (US Federal 40%, UK IHT 40%, JP 55%) fully credits against Thai 5-10% · often no additional Thai tax due · (2) Foreign Holding Company (BVI, Singapore, HK) holding assets before death — heirs receive HoldCo shares which are not one of the 5 taxable Thai classes (beware GAAR + CFC) · (3) Foreign Trust / Bare Trust set up before death with Trust Deed enforceable under foreign law · (4) Foreign Will + Thai Will (Multi-Jurisdiction) — separate probate in each country · (5) LTR Visa holder changing residency before death shifts heirs' tax position
Pitfalls: 🚨 (1) Foreign executor unaware of Por.Mor.60 filing duty = penalty · (2) US Estate 40% + Thai IHT 5% = credit must be complete or double tax · (3) BVI/Cayman HoldCo can be argued 'effective management in Thailand' + CFC · (4) Crypto on foreign exchanges still reportable · (5) Foreign Will without probate + Apostille = not usable in Thailand · (6) Failed nominee structure = tax + criminal case · (7) OECD CRS/CARF automatic exchange = concealment no longer viable
✓ NYC Legal Case: US Estate Case · Thai-American decedent (Green Card holder) resident in California · total estate USD 45M (~THB 1,580M): US real estate 20M + US brokerage 15M + Thai condos 8M + Thai SET 2M · US Federal Estate Tax 40% × ($45M − $13.61M exempt) = $12.56M · Thai IHT for 3 Thai children: 1,580M/3 = 527M each · 427M × 5% = 21.35M each · total 64.05M · DTA Credit: US tax paid THB 442M ÷ 3 = 147M/child (exceeds Thai tax) → Thai IHT = zero · NYC Legal Cross-Border Estate Package + Apostille + DTA Filing THB 1,850,000
Decision Matrix — 6 Scenarios of Inheritance + Gift Tax 2026
Scenario
Scope
Rate
Base
Exempt
Best For
Estate · Descendant/Ascendant
Inheritance to children/parents/grandparents
5%
5 asset classes – debts
100M/recipient
🎯 Standard case · split among recipients for per-person threshold
Estate · Other Heir
Siblings, nephews/nieces, friends
10%
Same as direct line
100M/recipient
🚨 Consider legal adoption / foundation
Estate · Spouse
Legally-registered spouse
0%
After splitting community property
🎯 Unlimited
Register properly · foreign spouse must Apostille
Gift · Descendant/Ascendant
Lifetime gift, direct line
5% Final
FMV
20M/yr/recipient
🎯 Multi-Year Estate Plan · 10-year phasing
Gift · Others (Moral)
Occasions of moral duty
5% Final
FMV
10M/yr/recipient
Weddings / ordinations / New Year · requires Gift Letter
Cross-Border / Foreign
Worldwide Assets
5-10% + DTA Credit
FMV @ BOT rate
100M/20M/10M
🌏 US/UK/JP heirs · Apostille 14 Feb 2026
Frequently Asked Questions — Thai Inheritance + Gift Tax 2026
What is Thai Inheritance & Gift Tax in 2026? How does it compare to the US/UK?
Thailand reintroduced these taxes on 1 Feb 2016 (after 72 years of repeal) under the Inheritance Tax Act B.E.2558 + Revenue Code Amendment (No.40) B.E.2558. Two parallel regimes: (a) Estate Tax paid by the RECIPIENT (not the estate) at 5% (direct line) or 10% (others) on the portion above THB 100M PER RECIPIENT · (b) Gift Tax 5% Final on gifts above THB 20M/year (direct line) or 10M/year (others under moral obligation). Comparison: 🇺🇸 US Federal 40% (exempt $13.61M 2025) · 🇬🇧 UK IHT 40% (nil-rate £325k) · 🇯🇵 JP 10-55% · 🇦🇺 no estate tax · 🇸🇬 none. Thailand has among the lowest rates and highest thresholds globally. NYC Legal casework: 187 estates + 96 gifts + 42 cross-border · 96% success (2022-2025).
Which 5 asset classes are taxable? What's 'outside the base'?
🎯 Section 3 of the Inheritance Tax Act lists 5 classes: (1) 🏠 Real estate · (2) 📈 Registered securities (SET/MAI/registered bonds) · (3) 💰 Bank deposits and other financial-institution balances · (4) 🚗 Registered vehicles (car/boat/aircraft) · (5) 💎 Other financial assets per Royal Decree (insurance payouts > 100M · structured notes · certain digital assets). 🚨 'Outside the base' (Grey area): gold bullion · diamonds · fine art · physical cash · crypto held off-exchange · unlisted private-company shares — BUT beware Section 14 Anti-Avoidance if the structure is clearly designed to evade tax.
Is the THB 100M threshold per estate or per recipient? How do we split for maximum savings?
🎯 PER RECIPIENT — key Estate Planning insight. Example: THB 500M split among 5 children = 5 × 100M fully exempt = zero tax. Same 500M to one child = 5% × 400M = 20M tax. Strategy: (1) Split among all children + their spouses (all direct line 5%) · (2) Include grandchildren (direct line) · (3) Use registered public-benefit foundations (100% exempt) · (4) Legally-adopted children count as direct line. 🚨 Caveat: 'one recipient' aggregates ALL assets from the same decedent — 80M home + 60M shares to one child = 140M, so 40M × 5% = 2M.
How does the 20M/year Gift Tax threshold work? What can multi-year plans save?
🎯 20M per recipient per tax year (per-recipient · per-year · resets 1 Jan). Final 5% above threshold. Multi-Year Plan example: father wants to transfer 300M to 3 children · 5-year plan: 60M/year (20M × 3) × 5 years = 300M fully exempt = zero. Compare to estate at death: 300M split 3 ways = 100M each exempt = zero (but 300M to one child = 5% × 200M = 10M tax). Advanced: children + spouses + grandchildren = 12 recipients × 20M = 240M/year (300M done in 1.25 years). Always elect Final 5% over PIT (which can hit the 35% bracket).
Spouse inheritance fully exempt? How do foreign spouses qualify?
🎯 Yes (Sec.12(1)) — 100% exempt, no cap. But only 'legally-registered spouse'; de facto partners pay 10% (Other Heir). Foreign spouse: (a) Marriage registered abroad (US/UK/AU/JP) is fine · (b) Marriage Certificate must be Apostilled (new from 14 Feb 2026: 2-step chain Notary → Apostille · 5 days · 2,500 THB) · (c) Translated + registered at a Thai amphur/district office · (d) Best done during lifetime for certainty. Without Thai registration, the Revenue Department can reject spouse status — requiring a Foreign Judgment Recognition action in Thai court (6-12 months · 300,000-500,000 THB).
US/UK/JP Estate Tax + Thai IHT — double taxation? How much does the DTA credit help?
🎯 No double taxation if the DTA credit is used correctly. Thai-resident heirs are taxed on worldwide assets at 5-10%; foreign estate tax paid at source is fully creditable. Example: Green Card holder dies in California with $45M. US Federal Estate Tax 40% × ($45M - $13.61M exempt) = $12.56M (~442M THB). Thai IHT for 3 Thai children: 1,580M / 3 = 527M each · 427M × 5% = 21.35M each · total 64M. DTA credit: US tax paid 442M ÷ 3 = 147M/child (exceeds Thai tax 21M) → Thai IHT = zero. Required docs: (1) IRS Form 706 Filed + Paid Cert (2) Estate Closing Letter (3) Apostilled + translated. NYC Legal Cross-Border Estate 1,850,000 THB.
Does pre-death adoption really convert 10% → 5%? What's the timing?
🎯 Yes — converts 'Other Heir 10%' to 'Descendant 5%'. Conditions: (1) Legal adoption registration (Sec.1598/1-40 Civil Code) · (2) Court hearing + 30-day notice · (3) Timing must be 6-12+ months before death — otherwise Sham (Sec.14 Anti-Avoidance). Age gap must be ≥15 years, adopter must be 25+, spouse must consent. Safe when the adopter is 60+ and in good health. Alternatives: (a) Public-benefit foundation (100% exempt) · (b) Temples/religion (exempt) · (c) Split recipients (100M each) · (d) Lifetime Gift 10M/year.
Cryptocurrency, art, and gold — taxable estate assets?
🎯 Grey area — depends on registration: (1) 🪙 Crypto on SEC-registered exchanges (Bitkub · Satang) = Class 5 'other financial asset', fully taxed. Self-custody wallets = grey (often unreported, but OECD CARF 2025 changes this) · (2) 🎨 Fine art (painting/sculpture/NFT) = outside the base literally, but Sec.14 applies to high-value obvious tax planning · (3) 💎 Gold bullion / diamonds / luxury watches = outside base · (4) 💵 Physical cash = outside base. Practical: still declare in the will + probate, but no Por.Mor.60 filing. CRS/CARF (foreign banks + crypto exchanges) is now active — hiding is not viable.
What does the Executor do? What's the liability for mistakes?
🎯 Five tax duties: (1) File Por.Mor.60 within 150 days of receiving inheritance · (2) Withhold tax from recipients before transfer · (3) Notify Land Office / banks / SEC to transfer title · (4) Maintain separate estate accounts · (5) Report to court on completion. 🚨 Liability: (a) Non-filing = fine + up to 1-year imprisonment (Sec.36) · (b) Under-withholding = joint liability with recipient · (c) Transfer before withholding = Revenue Dept can pursue for 10 years · (d) Sham/fraud = 3-7 years imprisonment (Sec.37). NYC Legal Executor Service 185,000-450,000 THB.
How does Apostille (14 Feb 2026) intersect with IHT/Gift? What are NYC Legal's fees?
